Update CHANGELOG.md

CHANGELOG.md

@@ -47,6 +47,7 @@ ENHANCEMENTS:
 * cloudfunctions: Add `runtime` support to `google_cloudfunctions_function` [GH-2340]
 * cloudfunctions: Add new-style Storage and Pub/Sub trigger support as well as Firestore trigger support to `google_cloudfunctions_function` [GH-2412] [GH-2480]
 * compute: `google_compute_url_map` resource is now autogenerated and supports multiple import formats. [GH-2245]
+* compute: `google_compute_health_check` supports for content-based load balancing (`response` field) in HTTP(S) checks. [GH-2550]
 * dataproc: Add `accelerators` support to `google_dataproc_cluster` to allow using GPU accelerators. [GH-2411]
 * container: regional and private clusters are in GA now [GH-2364]
 * iam: `google_service_accounts` now supports multiple import formats. [GH-2261]